Please help me to solve this inner class problem in Python

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Python

class student :
  def __init__(self,name,rno) :
    self.name=name
    self.rno=rno
    self.Lap=self.Laptop 
  def show(self) :
    print(self.name,self.rno)
    self.Lap.show()
  class Laptop:      #inner class
    def __init__(self) :
      self.brand="hp"
      self.cpu="i5"
      self.ram=8
    def show(self):
      print(self.brand,self.cpu,self.ram) 
s1=student("ravi",2)
s2=student("kumar",3)
s1.show()

I am getting an error please help me

What I have tried:

I am tried but getting an error

ravi 2


Warning\Error

Traceback (most recent call last):
  File "file.py", line 18, in <module>
    s1.show()
  File "file.py", line 8, in show
    self.Lap.show() #inner print
TypeError: show() missing 1 required positional argument: 'self'

Posted 31-Jan-20 22:19pm

Ravikumar Mk

Updated 31-Jan-20 23:20pm

Richard MacCutchan

v2

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Richard MacCutchan · Answer 1 · 2020-01-31T23:20:00

Solution 2

You forgot the parentheses in your call to create an instance of the class Laptop. It should be:

Python

class student :
  def __init__(self,name,rno) :
    self.name=name
    self.rno=rno
    self.Lap=self.Laptop() # <- note trailing parentheses

Posted 31-Jan-20 23:20pm

Richard MacCutchan

OriginalGriff · Answer 2 · 2020-01-31T22:30:00

You don't need to pass self to a function: it's there in all classes automatically - it's the current instance of the class that contains the function.

Think of it like cars: all cars have a glove box, so you could write a function to add or remove an item from it - but you don't need to pass the car to the function because the glove box is "attached" to a specific cars already! You say "put my mobile in the glove box of my car" and "my car" is the instance: it already knows which glove box you are talking about because it automatically gets the car massed as self

Just remove the self from the function definition.

Please help me to solve this inner class problem in Python

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